Decorator Crab

Decorator Crab

The Decorator Crab is one of the most unique and entertaining invertebrates in the marine aquarium hobby. These fascinating crabs are famous for decorating their shells with pieces of sponge, macroalgae, soft corals, and other materials for camouflage, creating a constantly changing appearance that's both functional and fun to watch.

Decorator Crabs spend their days scavenging for leftover food, detritus, and algae while exploring every corner of the aquarium. Their curious behavior and natural camouflage instincts make them a favorite among reef keepers looking for an unusual and interactive addition to their clean-up crew.

Care Level: Easy
Temperament: Peaceful
Reef Safe: With Caution (may remove small polyps, zoanthids, or soft corals to use as camouflage)
Diet: Omnivore – algae, detritus, leftover fish food, mysis shrimp, pellets, and other meaty foods
Adult Size: Up to 3–4 inches (depending on species)
Minimum Tank Size: 30 gallons

AquaGemCorals Tip: Decorator Crabs love to personalize themselves! They may attach bits of sponge, macroalgae, or even small coral frags to their shell for camouflage. Secure valuable coral frags well, and provide plenty of rockwork for them to explore while they search for decorating materials.